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Download Oracle Database SQL Exam Dumps
NEW QUESTION 25
In the customers table, the CUST_CITY column contains the value 'Paris' for the CUST_FIRST_NAME 'Abigail'.
Evaluate the following query:
What would be the outcome?
- A. An error message
- B. Abigail Pa
- C. Abigail PA
- D. Abigail IS
Answer: B
NEW QUESTION 26
Which statement is true regarding the USINGclause in table joins? (Choose two.)
- A. It can be used to join a maximum of three tables.
- B. It can be used to join tables that have columns with the same name and compatible data types.
- C. It can be used to restrict the number of columns used in a NATURALjoin.
- D. It can be used to access data from tables through equijoins as well as nonequijoins.
Answer: B,C
NEW QUESTION 27
Which three statements are correct regarding indexes? (Choose three.)
- A. Indexes should be created on columns that are frequently referenced as part of any expression.
- B. A non-deferrable PRIMARY KEYor UNIQUE KEYconstraint in a table automatically attempts to create a unique index.
- C. When a table is dropped, the corresponding indexes are automatically dropped.
- D. For each DML operation performed, the corresponding indexes are automatically updated.
Answer: B,C,D
Explanation:
Explanation/Reference:
References:
http://viralpatel.net/blogs/understanding-primary-keypk-constraint-in-oracle/
NEW QUESTION 28
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